Engine-piston.



PATBNTED APR. 14, 1903.

H. M. QUICK. ENGINE PISTON.

APPLICATION FILED MAY 11, 1901.

N0 MODEL.

1% A/w/nr I By @M; 97

W1 TNESSES ATTORNEY.

rrnn States Patent trims.

HIRAM M. QUICK, OF PATERSON, NEW JERSEY, ASSIGNOR OF ONE-HALF TO HENRYB. KING, OF PATERSON, NEW JERSEY.

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SPECIFICATION forming part of Letters Patent No. 725,188, dated April14, 1903. Application filed May 11, 1901. $erial No. 59,771. (No model.)

To all whom it may concern/f Be it known that'I, HIRAM M. QUIoK, acitizen of the United States, residing at Paterson, in the county ofPassaic and State of New Jersey, have invented certain new and usefulImprovements in Engine-Pistons, of which the following is aspecification, reference being had therein to the accompanying drawings.

My invention relates to pistons for engines, and although especiallydesigned for use in my gasolene-engines it may be employed in engines ofother types.

The principal object of my invention is to provide a piston which willincrease the power and durability of an engine by reducing thefriction-surface of the piston where it comes in contact with the innerwalls of the cylinder. This is accomplished by the novel and peculiarconstruction and arrangement and the combination of the parts of myantifriction-piston, which will be hereinafter described and is shown inthe accompanying drawings.

In the dilferent figures of the drawings similar letters of referenceindicate like parts.

Figure 1 is a side View of my piston. Fig. 2 is a cross-sectional Viewthereof on the line w or in Fig. 3, and Fig. 3 is a longitudinal sec- Itional View of the same on the line g y in Fig. 2.

In the drawings, A represents the body of the piston, which is providedwith the friction or guiding surfaces at, the arms or ribs a connectingsaid friction or guiding surfaces a, but not being flush with saidguiding-surfaces, the packing-ring holder B, the washer or end portion0, and the annular recess or seat for the packing-rings D. The bolt 6serves to hold the parts A, B, and 0 together and to connect the pistonto the connectingrod of the engine. As shown in Fig. 3, the

thickness of the wall of the piston, both of the friction portions a andthe ribs C6, increases toward the end of the piston, thus affordingthe'lightness and diminishing the friction of the piston on the innerwalls of the cylinder, reducing it to a minimum with out sacrificingtheelement of strength. This reduction of the friction enhances the powerand prolongs the life of the engine, besides giving a high piston speed.

I do not wish to limit myself to any particular shape or the pistonsfriction or guiding surfaces, as the essential element or principle ofmy piston, which consists in reducing to a minimum the surface portionwhich comes into contact with the inner surface of the cylinder when inoperation, may be applied to any piston, no matter what its shape,square, oval, or round. In all cases the conformation of the interior ofthe cylinder will determine the shape of the pistons guiding or frictionsurfaces Without departing from within the-scope of my invention.

With this description of my invent-ion,what I claim as new, and desireto secure by Letters Patent, is

1. In a piston, the perforated integral cupshaped portion A, the Wallsof which grow thicker toward the bottom, annular frictionsurfaces a,depressed longitudinally-extending ribs a connecting said annularfrictionsurfaces, the packing-ring holder B having annular seats, thepacking-rings D adapted to rest in said seats, the end portion 0, andthe bolt 6 securing the parts A B and 0 together, and serving to connectthe piston to the connecting-rod of the engine, substantially as setforth.

2. In a piston, the combination of a perforated cup-shaped portion A,the packing-ring holder B, and the end portion 0, all constructed asshown and described, with the packing-rings D, and the bolt 6, adaptedto secure the parts A B and 0 together, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

HIRAM M. QUICK.

Witnesses:

JOHN F. KERR, BESSIE STEWART.

